Solid spring ball and process for making same

Abstract

The invention discloses a solid elastic ball, which comprises a built-in foamed polyurethane ball center and a spherical latex bag wrapped on the outer wall of the polyurethane ball center. The outer wall of the latex bag is sprayed with polyurethane varnish and polyurethane wear-resistant oil. The invention also discloses a method for manufacturing the solid elastic ball, which includes the following steps: a. inject polyurethane material into the spherical hollow latex bag; b. put the latex bag filled with solid polyurethane material into the mould, and foam and shape it; c. 1. Trim and level the feed port of the latex bag, and spray polyurethane varnish and wear-resistant oil on the spherical surface of the latex bag to finish the finished product. Compared with the prior art, the present invention has the advantages of: the combination degree of the center of the ball and the latex bag of the wrapping layer outside the center of the ball is greatly improved, the latex bag is evenly stressed, the sphere is not easy to deform, the outer wall of the latex bag has good integrity, and there is no foaming. Phenomena such as delamination and rough handle do not exist at all, which also improves the brightness and wear resistance of the ball, and facilitates the subsequent surface spraying process.

Description

technical field [0001] The invention relates to an entertainment and sporting product, in particular to a solid elastic ball, and also relates to a manufacturing method of the solid elastic ball. Background technique [0002] The existing solid elastic ball is most commonly made of polyurethane (abbreviation: PU). The surface of this kind of solid elastic ball is generally not covered with other materials. The semi-finished polyurethane is put into a mechanical mold and polished to form a round shape. The sphere, and then into the hi spherical surface brushing treatment, and finally the crust leaves the factory. This manufacturing method has the following disadvantages: 1. The processing is cumbersome, which leads to high manufacturing costs, and the leftovers are not effectively recycled, resulting in serious waste of materials; 2. The subsequent polishing and crusting mainly rely on manual labor, which inevitably produces many uncertainties. The result is that the product...

AI Technical Summary

Problems solved by technology

This manufacturing method has the following disadvantages: 1. The processing is cumbersome, which leads to high manufacturing costs, and the leftover materials are not effectively recycled, resulting in serious waste of materials; 2. Subsequent polishing and crusting mainly rely on manual labor, which inevitably produces many uncertainties. The result is that the product is prone to foaming, delamination, rough hand feeling and other problems; Third, due to the limitation of its own material and the existence of no wrapping layer, during the use of the ball, a large amount of gas in the ball leaks out, the resilience is weakened, and the use time is shortened

However, the manufacturing process of the above two patent documents is relatively complicated, and the input cost is also high, and the manufacturing process does not deviate from the traditional category. It is firstly formed into a solid sphere, and then the follow-up work is carried out. The performance of the product is greatly affected by the follow-up man-made. , the product is easily deformed during use, and the combination of the center of the ball and the surface material is not good, resulting in a very limited service life of the final product, so further research and improvement are needed

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